My father is very busy with his business; therefore, he is always willing to give a hand

Câu hỏi :

Choose the letter A, B, C, or D to indicate the underlined part that needs correction.

A. with 

B. therefore 

C. willing to give 

D. a hand

* Đáp án

B

* Hướng dẫn giải

Đáp án B

therefore => however

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